feat: 增加门店身份注销流程

suixinkan/UI/Login/LoginViewController.swift

@@ -11,7 +11,7 @@ import UIKit
 final class LoginViewController: BaseViewController {
 
     private let viewModel = LoginViewModel()
-    private let authAPI = NetworkServices.shared.authAPI
+    private let authAPI: AuthAPI
 
     private let backgroundImageView = UIImageView()
     private let welcomeLabel = UILabel()
@@ -29,6 +29,17 @@ final class LoginViewController: BaseViewController {
 
     private weak var accountSelectionController: AccountSelectionViewController?
 
+    /// 默认使用共享登录服务，测试可注入Mock网络客户端而不修改真实会话。
+    init(authAPI: AuthAPI? = nil) {
+        self.authAPI = authAPI ?? NetworkServices.shared.authAPI
+        super.init(nibName: nil, bundle: nil)
+    }
+
+    @available(*, unavailable)
+    required init?(coder: NSCoder) {
+        fatalError("init(coder:) has not been implemented")
+    }
+
     override var preferredStatusBarStyle: UIStatusBarStyle {
         .lightContent
     }
@@ -264,6 +275,7 @@ final class LoginViewController: BaseViewController {
     }
 
     private func performLogin() {
+        guard !viewModel.isLoading else { return }
         viewModel.normalizeUsernameCountryCodeIfNeeded()
         accountField.text = viewModel.normalizedUsername